Cutting or trimming machine.



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l wvvwbo'z Edward Nall NALL.

www oRTmMMmG MAcHnNE.

`Muon man MINE 11 19|@ lntonted July 123. IUI#J Edward lVcllZ wenn,

itrimming machine in UNITED eTATis PATENT orrgion.

EDWARD NALL, 0F AKRON, OHIO, .ASSIGNQR TO THE GOODYEAR TIR-E ANI! RUBBER COMPANY, 0F AKRON, OHIO7 A CORPBATIQN GF OHIO.

CUTTING 0R TRIM'MIIG MACHNE.

.Specification of Letters Patent.

Application filed June I?. 1916.

To all yw/zonz 'it may concern vBe it known thut I, llnunun NALL, n Citi zen of the United States, residing at Akron, in the county of Summit land State of Chio, have invented new und useful Iniprovements .in Cuttirngr or Trimming hluohines.

My present invention relates broadly to new und useful improvements to cuttingl or trimming machines hut hes particular reference to uilnachine of this character, which is espei'inlly adopted for trimming the over` flow or "Huel1" from the metall base band of solid rubber tires..

In t 1 manufacture oi' solid or cushion rubber ires, it is n pruotice of Considerable extent: to vulczinize the tire body upon nu annuler inet-(1l bese bund, which subsequently is mounted upon the wheel und constitutes the rim or .telly thereof. In molding the rubber bod y upon the metallic bend, :t leuk-- age or sorelled overflow of the rubber usu- :illy occurs through the space between the edges of the mold end the metal band, it being impossible under econonicul rnanufncturing conditions to mdk:- the joints between the edges of the mold und the band entirely liquid tight. The result is that a relatively thin Strip of overliow rubber coninn'inly celled flash l is present on each side of the tire when it is withdrawn from the mold. This overllow strip generally occupies the space between the edges of the tire body und 'the edge of the base bund and frequently is partially adhered to the edge of the band.

It is, therefore, one oi the principal ob` jects of the present invention to provide e which two sets of knives are provided to trim the overflow on each side of the tire base; the knives of each set being eomplementully arranged in such manner that they mit simultzuieously trim the overfiovv on the tiene of the base baud and that which is adhered to the edges thereof.

Inusmuch as the machine minst be capable of receiving and trimming tiros of different sizes, it is another object of the invention to mount. the sets of knives for relative adjustment in a convenient manner whereby the operator may quickly shift the two sets -of knives to properly engage them With the edge portions oftiresof di erent sizes.

A further object is to provlde a novel mountin for each set ot' knives whereby each individual knife of each set may be ad- ]n'tentzed July 23, 1918. senat No. 104,246,

justed independently oi' the other knife to etfect its etticiont engagement with the portion of the meint rim against disposed to not.

Still another object' of the invention is the provisiiln ol: a relatively sil'nple but nevertheiez-ie eilieient su )porting or driving man drol upon Whirh the tire muy be placed and by which it muy be turned with respect t0 the lin; vos during' the triinnnug operation.

The above and other inciiilental objects of u similar nature which will be hereinafter more Speciiiifnlly treated, muy be ac complished by euch means ne :1re illustrated in the accompanying drawings, described in the following specification and then more particolari y pointed out in the claims which are appended hereto and forni e part of this application.

With reference to the drawings, wherein there has been illustrated n preferred embodiment of the invention es it is reduced to practice und throughout the several view@1 of which similar reference numerals designute corresponding' parts:

lig'nre l is u top plum view of the machine witi parte thoreijrf in operativo assembled relation;

Figi. l is :i eine elei :ation:

Fig. .Pl is a section on the line 3-3 of Fig. il;

Fig. et is u section on the line fit-4 of Fig. l; i

of knives in engagement with the edge pol-n tion of the metal base rim ot' the tire, the view being in front elevation; and

Fig. C is n detail perspective of n pair of the knives mounted in the knife set which forms an integral part of a rotatable yoke.

A preferred embodiment of the invention such us is shown in the accompanying draw ing includes ae essentialr elements of construction :t buse stand 10; a. pair of power driven cylinders 11 and 12, which .jointly comprise the supporting and driving man dre] for the tires to be trimmed; pairs of annular guide members 13 and 14, which are respectively mounted upon the cylinders 11 and 12 and are relatively adjustable thereon for the purpose of accommodating tires of different base widths; and two sets of trimming knives which are revoluble about the guides 13 and are carried upon yokes or bands 15.

Fig. l5 is e detail view illustrating one set which it is The Suplgiorting hase or s( :1nd 10 may he of any conventional design lint is preferably given a reotilinoar, hoxlilto.y lorin as in Fig. f2. Upon the top Slab 16 o thin1 stand are mounted (or, if desired, integrally formed) a pair of parallel Ieleeve-liearinge` 17 and 18, which are connected by a brace plate 8:2 and receive the shafts 20 and 21 upon whirh thtl Cylinders 11 and 12 are respectively mounted in a manner to be hereafter exiilained.

The roar linde ol'y the Shafts; are roeoired. in bearings zmnd 23 which rise i'roni the top ol the stalid. A housing 2l, olf ,eht-ot metal, or other material as desired, rxtonda traneversely arrose4 the top plato 16 io ioclose three Jinione4 25, 2t and 27, thiI first two of wliieli are keyed upon the shafts 2U and 21 adjacent to the rear onde thereof. The pinion 27, as shown best in Figa. .l and 2, meshes with each of the pinions 25 and 26, is keyed upon a. jack shaft 'x28 jonrnalod in bearings 29 and 30 and connected at, its rea r end through the medium of a relatively large pinion or gear wht-el 31 and a amall pinion of' the motor Shaft lo the n'lotor conventionally illnetrated at Upon joint perusal of Figs. l and il will be Seen that the motor drive wiil ho transmitted to the two shaft@y il() and 2i to rotate 1in-se nieinbera at corresponding speeds.

The tylinders and 12 are either integrally formed on the outer ends of the shafts 20 and :di as in Fig. 3 or are detach- Plbly Secured lo the ends of these halte for rotation therewith. The in r end of each cylinder is cloned by a wall f `vhich is pret-- erably integrally formed ne in Fig. 3 and is provided in its inner face with a socket 3:3. he outer end of each Cylinder is closed by a plattl 36 whit-h is secured by n Screw or a similar fastening device 37`1and ie provided with a Centrally lor-ated apditnro 38 through which pansee the arrow -liaft i-lil. The inner end of the ,screw Shaft is; in nach instanre reduced to provide a .alud 40 which sente in the aofket $25. while tlity onter rnd is alno rednr'vd to providr a stem 11 and a Shoulder 4:2 whifh bears against the inner fare of the` `plato fnl. Thus, the shaft iS held againet ilongimdinal mmrninnt. 'llo the Stern 4l is idetacliahly Honored a hand wheel 4:3 or an geqnivalrnl operating devine by which the leeren hatt may ho turned to adjust the guidon il or 14 as the oaslo may be. The guides lll and l1 aro rontrollod hy .the srrow shafts through thv inrdilnn oi' ilneadrd Sleeves 44 which are formed at the enter ot the Spoken' lil. s will he kwen hy itl'oronro to Figs. Il and l. !lm #polo-e aridisposed for movon'msit through ilianmlrirally oposed longitudinal lots lh in the o rlinders. ho threaded l|nl1- or nhoxw oi ilu? f nidf.l`v lf arr ohpowlj. thin-adhd so that the torn-r ng of-ihi :www hliatl in one dirretion will anw llnseparation ol' the guidi-s 13 while (ho tin-ning in the other dirertion will ranno Thom to nppri'iaeh oai-h other. The same is: true of the indie' of the guidon 14.

It will now ho rvadil)f apparent that the hand wheels may he conveniently manipir lated lo relatively adjust the guides 13 and the guides ll lo aruonnnodate then: to tire` of any given lmao width.

'llie guido nninliors` lil are` farli providrd with a oirinniforrntiai l'znial g'i'i'ioi'o 1T whoroin in |i-ri iv rd no annular hand or xoh'i having a lindo rwoiving .orhot or mount ing lll as. .lisrlonrd in lvl-ail in Figa. .3 and il. llr'l'oriii'ig to those tignros, it will lio .wi-rn that the linii'u mounting is provided with two slots, 5U and 31. whirl: receive thv two knives and 53 operato upon the far-.0 ot the hase hand and the side edge thereof. Tho slot of) opone throng-li the Hide ol the mounting' so that thv knife may lio disposed approximately tan `.Qjontial to thi'. fao@ of tho liano hand dnrlni,y lheirinmiing owration. The slot 51. opens through ilio iop ot tho mounting and is dien poised angfnlarlj.' with reepmt to the alot ."il 0 that the l-:nifo ffl may he molino-d to die` pom. im Hitting rdgo at nn angle lo the sidi odge of the liano hand Srl, .arrows 'indicated at'l may bo employed in oonventional manner to secure the knives in position. lt in to be noted that the knives are independr.ntl \r adjust-able so that. each may be properi)v seated in the mounting to )rovido for the most effective engagement o its rotting' odge with. the portion ot' the hase hand against whit-hit acte when the flash iS being trimmed from the tire. A, handle such as indirfdod at 55 is provided for each ot' the knife ailpportii'igl yolcoe o that the operator may h): pnlling down on the handles bring' the imiwm into engageant-nt with the hase liand ne host di elo-wd in Figa. 3 and Ll',

lfroni iin' foregoing desiti'iption o'lx thv alriarlilral fealnree of tho embodiment ot' the invention illnatrated herein. the' prio' eiplee upon Whirh tht triinnioi' is adapted to operato will he nmlorritood.

The tire is; #lipped over the handles i# Seated npon the rylindors` 1.3 and Il. The ririenil through the motor is then closed and :is a result. the tire is rotated. in the dirnlion ot' the arrow shown in Fig. 2, through tho revolution of the rylindels. lt is; here lo oo explained that the wright ot' th(v1 tiro and it@ nirtal hase hand iS kanh'ioient to eftoot tho required lraition between the cylindors and the him band. After the tire has mnnn'mncnd to inrn. the attendant pulle down on the two handles loringingr the coinplenn-nial knives of earll arl into sininllanoone` engagement. with of thil hase hand tare and the side edge.` of the hand. the ire oontinnei-y to rotate the attendant holds the handles zo keep the and adapted to resfnolivelrthe edge portions 1 so that the application o knives against the base baud so that the knives 52 trim the flash or overflow rubber from the edge portions of the face of the rim and the knives 53 from the side edges thereof.

In operation either one or the other or both of the handles 55 can be pulled down and manuallv held in the active iositiou duringr the trimming.

In concluding the description of the present inveutioiny it is desired to point out somo of the principal advantages which flow from the specic embodiment of the invention herein disclosed. The embodiment of two cylinders and the arranging of them so that they may jointly act as a supporting or' driving mandrel eliminates the necessity of clamping the tire upon a slider or the like tires and their removal during the use of the n'iuchim is considerably facilitated. At the same time the two cylinders provide an adequate iris ing means for rotating the tires inI opposition to the resistance offered by the knives which must bear with considerable i'urce upon the base band in order to completely remove the overflow of rubber therefrom. The mounting,y of the guides 13 and 1 4 for relative adjustment gives the machine a wider range of usefulness so that it may be employed in trimming tires of different base widths. The mountin of the knives of each set for indepen ent adjustment makes it possible to keep each knife in service a greater length of time since by frequent adjustment of the knives the base bands will act as abrading elements to keep the cutting edges of the knives sharp.

In reduction to practice, it has been found that While the form of my invention, illustrated in the drawings 'and referred to in the above description as the preferred embodiment, is the most efcient and practical.; yet realizing that the conditions concurrent with the adoption of my device will necessarily vary, I desire to emphasize the fact that various minor changes in details of construction, proportion and arrangement of parts may be resorted. to, when required, Without sacrificing any of the advantages of mv nvcntiomas defined in the appended claims.

ne f Athe pr'mepai modifications to which tlil'le present invention may be very readily s injected `under`scme conditions 1s the subst tation of a spider or its equivalent as a rotating support for the base band which is to be cleaned. If this substitution were made, the yokcs 15,'which carry the knives, could be very readily mounted upon a supporting cylinder mounted for adjustment with respect to thfqaxis ofthe spider 'to still make possible the utilization of the machine in connection with tires of dierent diameters.

tion of the article.

3. A trimming machine of the character described including a supporting structure; a revolublc member for supporting and rotating the article. to be trimmed; a knife member loosely mounted upon the revoluble member and adapted to be adjusted bolli longitudinally and circumfcrcntially for cugagemcnl with the a i'firle to be trimmed for removing;r material therefrom during rotin tion of the article.

4. A trimming machine ol'v the character.' describedincluding a supporting structure: a supporting member for the article to be trimmed; a pair oli/knives loosely mounted on the supporting member and adapted to be adjusted longitudinally thereof When-by they may be moved into or out of engagement with the opposite edgy portions of the article to be trimmed; and means for rotating said supporting member whereby the article to be trimmed niay be rotated in opposition to the knives.

f 5. A trimming machine of the character ydescribed includingr a supporting structure;

a pair of complemental cylinders adapted to loosely receive and to support the base band which is to he trimmed; meine: ien simulmneously rotating`r the cylinders :it equivalent speeds; and a pair or knit es lon gitudinally adjustable upon one of the said cylinders and adapted to act upon opposite edge portions of the base band to be trimmed.

(i. A trimming machi e of the character described includingr a suxlnporting structure; a pair ol :,:omplemental cylinders adapted Ito loosely receive and to Support the base. f band which 1s to be trimmed; means for simuliancously rotating the cylinders at equivalent speeds; a pair of knives longitudinally adjustable. upon one of the said cylinders and adapted to act upon opposite edge portions of the base band to be trimmed; 'and longitudinally adjustable guide members on the other cylinder adapted to be respectively alined with the corresponding' knives of the first mentioned cylinder.

7. A trimming machine of the character described including a supporting structure;

n cylinder adapted to loosely receive und support the base banni to be trimmed; menus for rotating the cylinder whereby the buse band may be rotated during the trimming operation; n pair ot' trilmniinLgr knives; menus longitudinally adjustable upon the eylimler for loosely7 supporting the knives whereby the knives may be held relatively stationary during the rotation oi the bone bund; and menus for Himnltuneously adjust-- ing the Second mentioned menos upon the Supporting member for drawing the knives toward euch other or separating them, wherelrv base bands oi ditlering widths muy be trimmed by the knives.

8. A trimming1 ninehino ot the ohnrnetrr described including u supporting lstructure; it cylinder adopted to loosely ret-nire und support the hase bend to he trimmed; means for rotating the cylinder whoreliv the hnse bendniay be rotated during the trimming operation; u pair of trimniingir knives; nn'nns longitudimilly adjustable with respeet to tlux :v vlinder und supporting the knives wherehr the knives may he hold relativelyY stntirmurlv during the rotation of the huso hund; sind means: for simultaneously adjusting; the seeond mentioned means longitinlimdly with respect to the cylinder for either drawing; the knives toward each other or sepz/lrnting them, whereby hase bands oi differing wir It in muy be trinnned by the knives.

9. A trimming machine of the elniriiet'er described ,including :i supporting` structure; :l pair oi parallel eylindersadopted 'lo loosely receive und support :i hose hand lo be trimmed; means for siinnltuneonsly rototing the cylinders at. equivalent speeds whereinr the hns-e hand muy be rotated during the trimming operation; :i pair of guide memherS adjustable longitudinally upon one of the Cylinders; means for adjusting said guides, said means being opertdde for drow ing the lguide members4 together or for separating them to aeeon'nnodute hase hands of different widths; n pair ol `simihtr guide memhers mounted upon the other evlimier; menus for simultaneously sepnruting or drawing together the second mentioned guide inemliern; n, set ot" eoniplelnentnl knives eni'ried by each of the second mentioned guide nieiollera; und zf knife mount ing supporting; mieli set of knives :1nd loosely' connected to :i guide member und adopted `to move longitndinallyl therinvitfh hut to remuin relatively statiormry during the rotortion of the guide members.

l0. A trimming niaehine ot the rhnructrr described ineluding u reiolntde rylinder: ineens to rotate sind o vlirder` sind cylinder being adapted to loosel' \r ree-ehe and rotate, u base bund to he triinn'n-d: nude tnenihers longitudinally adjustable upon the rjrlinder. Isaid guide members being' adapted to what :ipftinrd opposite edges oll the lense, hunds; rneuns controllingl the adjustment of thel guide, members :ind operuhle for simultaneously drawing them together or sepurnt ing them; Iand :l knife enirried by @zich ot snid guide mernhers, .sind knives heine; mounted for longitudinal :uljustment upon the elvlinrler in response to the udjuetment ot the ruido memher hut heing tree with respeet to the guidinleinhers ns regards rotuiion ol' the guides. wherohy the knife,

memheiw anni` he held in enn'ngeznent with the hun@` ound und in relutirelv .#.tntlonnryY position dnrimgy the trinnningzy ot' the huso hund.

l1. A trimming luuehine of the character desrrihed including' n supporting structure; :i reroluhle support adapted to rei-cire and rotntiy zx hase lntnd wliirh is to he trimn'ied; und :1 set ot eomplenientnl knives loosely mounted upon thtI supporting member for eirenniferentinl adjustment thereon whereh)l `nid l nive-` may he swung into eniilrnirementl with the nppositefedne portion of the lense hund tor trimmingV the hund when the sume is tiring rotutel.

li` trimming innuhine of the character deserihed inehiding u mpporting structure; it rmoluhle support :ulnpted to receive and rotule i hase hand which is to be trimmed und n set of oomph-mentul knives loosely mountzrd upon the supporting member for eiremnt'erent iol adjustment thereon, whereby smid knives may he swung into engagement with the, edge portion of the buse bond to he trimmed, one of said knives being en gngenble with the outer face of the hand, und the other knife being eng-agreable With the edge of the buse hand.

13. A trimming nntehine oi the character deserihed including.;` :1` Supporting strueture; n reroluhle support adapted to receive and Potete :t leise hond which is to lne trimmed; and two sels 'of' eomplenientnl knives loosely mounted upon the supporting member for ei rru in ierential adjustment' them-wn wherel rv said knives' muy he swung; into eng'ngenu-nt with the opposite edge portion of the huso hund for trimminir` the, hand n'lnn the sinne, is being rotated` eneh Set; ot' knives eonipris ing one knife n'hieh udnpted to engage. with the edge portion of lhe ouier fune, of the huso hund to he trinoned und nnother knife which is :idapted to engage with the edge of the hase hund; und means for independently :uliustineY the sei of the indr ridunl knives olf enrh not of knives.

14. A trimming;` machine of the character described including a supporting stru@ iure; purullet supporting cylinders revoluh| \v mounted thereon; ineens for simultanomsly rotin ingl the cylinders :it correspondun; speeds: n pair of guide members monnted noon euch cylinder; ine:ins for adjust- 4ment with the edge ing each pail' of guide members npon its uylinfler to eceoinmoelute the guides to huso bannis oi' different widths, said eylimiere lueing adapted to loosely receive :mit rotate bese hunde which are to he trinuned: e yoke freely mounted on each guide of one of the :ylimlvre for free vil'enniferentiel movement thereon`r whereby smid Yoke muy he heid. relatively stationary during' the rotation of the eyliniier; a knife mounting formed integrally with each yoke; anni n mir of triln` ming knives` monetari in engi: knife nonniing, eilt-h mir of knii'ie4 eomprising one knife whirli :niente-ft lo langauge with the outer faire of the hand to im trinmfieel :md finother knife which is engagetll'ih, with the side edge of the hand to he trimmed; and o. handle for euch yoke whereby ezirh piiir of knives muy he iminnfiiliy ewnng into engage Aiortion et if termi to he immed and heli n: trimming engagement -turing the ifiitntion of the hund,

l5. A trimmim nominee o the meter describe-fi imn'iiinff i: innioznwf if were; peil' ori peri izginortn i i f, Li

tieii f neon :im: ot te" wir i j ment with the zo tion to ne trimmed. 16. trimi'r fieserihed, inclu o enligne? ferintnrffi .fi pim' of partitie-l mi; i Jfrtmg cyfinfiei' eil to iooseiy iereiw rami import e i to be trimmed, zt pair ot knives sunniteneousiy :nijnstehie 'orion one of anni eupporting; eylini incl cire-imierentiiilly Wiili respect to th:A ifisu henri for eng: ment with the i portions of' ihim-ze i'mnil to he trinnneov, one wif snifl kni- :u iwingf diffpusefi for eiinegoi ein with the on iie of.' the heee initio :i1 i the ether of knives being imposed n! l; ih@ edge gwnion ni' iin* om i Y l?. t inaimnq :i iwi ne of the -h:ir::ri1'r tkiecriiietl, nnrimiwr i: knippert atrio-iure, :i pair of purnilel mpiforting i'iii'iiri's krimpted to loossefi'if receive :mil enpinni e t-u'llr mni to be trininxerh o imi!" or' iixes- `wii'nnltniieoneljf mijlnstiitie r on one of rift enpport ing; r'yiinrrli; anni eireoinferentinily with respect to the haer, hund 'for eig eminent with the `@irh portione ou the imei henri to he trinmwri, one oi nifl keiten' Ewing iiiepoewi to." iningnggeineii with the mier favo ot' the brie@ imnfl and the other ot mii! knives being iiiepoeeri tor ongiigoinrnt with tini vil "e portion ol the Einen hzinrl, nml menne Vi'or mh juaiiiiggj szlifi Emir of kuiten ioiiiriiinlilmlii upon the miijiort.

A ii'iinmingrj nnirhim' ini-hiding :i rotatable enpport intimiteit to i'vvrife :niel'wniled. thereon finti rotate he minnhn :ii'tirie to be trinnneil, :i knife :mil u support therefor mounted for swinging movement with r spoot to the :ii-ticle, whereby the knife may he moved into engagement with the article for trimming the sume, or dispoeed in inactive position spneeli from Seid article.

1%). A trinmiingwy nmchine inehuling :i rotatnhlu Support :nlnpteii to receive ami turn the annuler artiole to he trimmed; a pair of knives mounted for swinging movement in plaines parallel to the piane of rotation of the article to he trimnwd, whereby Said knives muy he swung' into rnigngement with the article or disposed at inactive position; and menne 'For adjusting the knives with respect to erich other whereby articles of different widthe muy' be accommodated between them :For trimming.

2G. A trimmiiig machine incinding fi ron I :itiihle shaft upon which am :mnnler object te he trimmer?. may he monnteri :mil by which it muy lie turned: :i pair of knii'ee adapted to he :sn/mig' in plenos parallel to the plane of rotation oi' the nitide to he trimmed, whereby mi knife@ nsf-if be ci'ignged with he ohiert to he tliimmfii or ispc'ie \(i in iw estive pwiition; sind. fig-ezine for simulta neony xilinstingg ihe Seial knives reizitive to nach other hy moving them toward or away rmii mieli other in paths ai', right angles to the phinelo miiition of' the article to be trinnnerl whereby :irtioiee of diferent Widths may he nifgemmnedfited hetw in the knives;

in e machine for removing; the Hush from solid tire hase hande, means for supn porting and rotating a hase hand; and mechanical meen; mounted on the first named menne for removing the Hash from the edge portions thereof, said mechanical means be inlemovnvlile for dieposil in native position iifiierein @nifl .menne engages the base band sind for a'isiiosni in inactive ponition wherein Heini menne spin-mi ,from the hase band. trimmingr machine of the character iiebifrihed inelutiing' :i eupportiiig Structure; :i rei'ehihle support adapted to receive and rotate n, base band which is to be trimmed; :ind n ot' complemental knives loosely moimteii upon the elimini-ting member for ci rrmn erenti :il edi netment. thereon W hereby said knives muy he independently swung into engagement with the oppositwedge p0rtion of the baise bend 'for trmiming the band when the seme is being rotated.

53. A trii'fmiing machine ineuding a` rotumble support upon, which im annular ob ject tto he t'rinnnerl muy he mounted sind by whieh it may he turned; a pair of knives :uhmti'wl to he swung in pleines parallel to the plaine of rotation of the article to he trimmed, whereby Said knives may either be engaged with the object to be trimmed or disposed in inactivo position; und means for iuljiiating the seid knives relative to each.

lll,

fl t

other hy moving; them toward or away from euch other in putin` et right :ingleb to the planeet rotation nl' the nriiele to he trimmed whereby urtich-u of ditierent widths muiv be accommodated Iie'lneen the knives.

Q4. A trimming nnufhine including :i roY tumble eylindrirnl support adopted to receive suspemh-d thereon und rotnte un unnulur object io be trimmed; :t puir of knives moulin-d for ,swinging movement in planes purulli-l to the plone of rotation ot the ine ticle to be trimmed whereby Suid knives; muy ,be swung into engagement with the article or disponed et inuetive position.

A trimming muehine of the ehurzutei.' deserihed, including :i supporting Structure, u cylinder mounted on the Structure and adapted to looeely receive and support zt buse bund to be trimmed, ineens tor rotuting,r the cylinder whereby the buse bund muy be rotated during the trimming operation; a pair of guide members mounted for siinultinieou` longitudinal adjustment with respect to the cylinder, seid guide nieml'iers being adapted to enguge against the opposite edges, of the buse bund for fixing the plane of rotation of the bese band; :ind it knife member mounted for adjustment longitudinally with respect ito the Cylinder whereby the knife muy be udjuuted to engege with the edge portion the buse bund.

2G. A trimmingI machine of the rhururter described including n Supporting structure. u 4revoluble cylinder mounted on the supporting structure und adapted to toneel); support und to rotate :t haine bund to he trimmed; guide memberh` for iixing the plane of rotation oi' the hiere bund und :t knife mounted for udjiistment iiiimgitiidi'A nelly witl respect to the @vlinder und trunsveruely niih respect to the buse intimi..

27. A trimming' nuit-inne of the ehm-:nier described including :I Supporting ntrueture, e. revoluble cylinder mounted on the :iupporting structure and adapted to loosely` Huppert und rotate n buse hund 1o he trimmed; guide members for fixing the pinne of rotation oi' the buse hand and u knife mounted for :idjustment longitudinull)v with reepeet to the eylinder und trtmS verselv with respect to the lume hund, und menne` whereb)Y Suid knife muy be udjusted with respect io the exis of rotation of the buse bund.

28. A tire trimmnig machine of the churucier described including` menne for mpporiing und rotating :i buse bund. :1 Set of knives for trimming the edge portion of the buse band` Suid set comprising two knives one of `which is adapted to engage with the outer iuee. of the buse Vbund :it the edge portion thereof und the other of which is udupted to engage with the side edge of the buse bund; and menus for simultaneously udjusiing both oi said knives laterali)Y with respect to the pinne of rotation of the hase bund.

2f). tiri` trimming machine of the charneter described including menne lor snp* porting und rotating :1 base band, u set of knives for trimming the edge portion of the linee hund, Suid Het comprising two knives, one oi which is udupted to engnge with the outer i'uee of the bar-e bend nt the edge portion there-hind the other of which is adapted to en 'fige with the side edge of the buse bend; :ind means for simultaneously adjusting' both ot Suid knives laterally with respeet to the plane of rotzition of the base bund; :md means for adjustin both of smid knives with reepeet to the exis of rottition of the buse bend.

In, testimony whereof I lieve signed my nume in tl presence of two subscribing ivi tneeses.

EDWARD NALL,

Witnesses Lnmt Rhenen, B. J. MUDANEL. 

